The CO2 content of the room air is regarded as indicator for the air quality in living areas. Humans release an average of 18 litres of CO2 per hour through the skin and by means of respiration. This does not remain without consequence for the required air exchange in your rooms. Increased CO2 concentrations cause tiredness, lack of concentration, deterioration of performance, headaches and many more types of health disorders. Together with harmful substances from building materials, carpets or furniture or in the event of strong perspiration of chemicals and volatile substances (e.g. cleaning agents), the disorders may range from eye itchiness and allergies up to skin and mucosal disorders and even liver diseases. You can only breathe in peace again once the used up, polluted air is constantly discharged from your house in a reliable and controlled manner.